The PFERD product range includes sharpeners for both manual and mechanical sharpening of saw chains. Sharpeners from PFERD stand out due to their long tool life and ease of use. Chain saw sharpeners from PFERD are exceptionally well-suited to the manual sharpening of saw chains. Manual sharpening is more economical and much more gentle than machine-based sharpening, and prolongs the operating life of the saw chain if resharpened at an early stage. The handy CHAIN SHARP CS-SL sharpening gauge combines a chain saw file and a gauge in one ergonomic tool. The defined elevation of the chain saw file makes sharpening the saw teeth easier and prevents the connecting links of the saw chain from being damaged. The gauge supports consistent sharpening results by providing the correct sharpening angle. The sharpening gauge comprises a Classic Line chain saw file with an ergonomic file handle and a gauge.